According to [1]} energy efficiency (EE) will be a key feature of the next generation wireless communications networks. As stated in [2]}, 6G networks will require 10 to 100 times higher EE when compared to 5G, to enable scalable low-cost deployments, with low environmental impact, and better coverage. Another central demand for the future of wireless communications is higher data reliability, [3]}, [4]}. As such, one challenge for MU-MIMO systems design is the increase in EE with minimum the bit-error-rate (BER) compromise.
